Pool Heating & Ventilation

Swimming Pool Heating & Ventilation

Heating and ventilating your pool area properly ensures comfortable water temperatures, prevents condensation or humidity damage, and maintains healthy air quality. At All Swim, we supply a full range of pool heating solutions - gas boilers, oil boilers, electric heaters, heat pumps, solar heating and heat exchangers - along with ventilation and dehumidification systems to manage indoor air. Whether you have an outdoor pool that needs season‑extension or an indoor pool room that requires humidity control, our systems are designed to optimise performance, lower running costs, and improve your swimming environment across the UK.

Integrating a good ventilation system also helps reduce corrosion, control condensation, and remove chloramines (the “chlorine smell”), which benefits both the structure and swimmers. We offer advice, product selection support, and share expertise to help you choose and size heating and ventilation systems that match your pool type, environment, and budget.

Swimming Pool Heating

Choosing the right swimming pool heating for your pool will help make your water more comfortable to swim in and will also extend the swimming season of your outdoor pool, a particularly significant consideration for pool owners in the UK! If you also combine an efficient swimming pool heater with one of our pool buildings you have a pool you can feasibly use all year round and you'll also benefit from lower running costs, less demand for swimming pool chemicals and reduced cleaning and maintenance costs. Choosing the right type of swimming pool heater can provide you with a swimming pool you'll be able to use regardless of what the UK weather throws at it.

How Do I Choose The Right Pool Heater For My Pool?

There are a number of different choices available with a pool heater, namely an electric pool heater, gas boilers, oil boilers, heat pumps or solar panels. Choosing between each type of swimming pool heating system will be dependent on the size of your pool and your particular expectations on running costs and initial investment. Our trained, helpful and knowledgeable staff are always available to help you make the right choice and we are always happy to discuss your individual requirements. We also provide free advice on which swimming pool heating system is going to be the best fit for your particular needs so if you're unsure don't hesitate to call our sales team on 02920 705059.

Electric Swimming Pool Heaters

Electric swimming pool heaters are the cheapest to buy and as such can be appealing to purchase but they tend to end up being the most expensive to run. You can, however, improve the running costs of an electric swimming pool heater by utilising the benefits of cheap rate electrical tariffs and/or by the addition of photovoltaic solar panels.

Gas Swimming Pool Heaters

A very popular choice of swimming pool heaters, gas pool heaters (otherwise known as gas boilers) are a great way to heat your swimming pool all year round and are available for indoor and outdoor pools. These pool heaters must be installed by a registered gas safe engineer in accordance with the appropriate regulations. These include the size and position of the flue, the gas supply and ventilation. Some gas heaters are designed to stand outside a building in the open air and in this case there is no flue but the heater's positioning is important and again must be in accordance with regulations. All Swim supply direct fired swimming pool condensing gas heaters.

Oil Swimming Pool Heaters

Oil boilers are another option and have long been used to heat swimming pool water but nowadays are less common in residential applications, nonetheless they are still a very efficient method of heating your swimming pool. They are designed identically to gas heaters, except they burn oil instead of gas. As with a gas boiler the flue and ventilation requirements are critical. Care must be taken when siting the boiler to ensure that flues do not terminate close to windows, boundaries etc. Additionally these stand alone pool boilers will require connection to an oil supply if existing or a dedicated oil tank.

Swimming Pool Heat Exchanger

This system is very popular when you already have a domestic heating boiler available that can act as the feed for a stand alone heat exchanger. It proves a very effective and economical method of heating your swimming pool as no additional swimming boiler is required - providing your domestic household energy source is sufficient, they utilise this heating system to transfer the heat to your pool water when not required by the house. The hot water from the house boiler circulates between the heater shell and the tubes; the pool water flows through the tubes and is heated by them (the two waters do not mix) the water from the house heating comes through pipes, which are connected to the heat exchanger and the pool water thermostat controls the pool temperature.

Swimming Pool Heat Pumps

One of the main advantages of swimming pool heat pumps is their low running costs combined with ease of installation with no complicated gas supply, oil tanks or flues required. All that is required for them to operate is a power supply and a concrete plinth for the unit to be installed on. It is no surprise that they are such a popular choice!

Heat pumps are based on technology used in refrigeration and air conditioning systems where they take the warmth out of the air, by compressing a gas which in turn increases in temperature heating the water as it passes through the exchanger. Heat pumps can provide, as a rule, from 4.7 -5.5 units of energy to the pool for every 1 unit paid for.

Solar Powered Swimming Pool Heating

With the costs of electricity and fossil fuels always increasing the prospect of heating your swimming pool using the energy of the sun can be very tempting, with the correct equipment this can be achieved saving you hundreds of pounds on heating your swimming pool every year. However, due to the unpredictable seasonal weather we would recommend using solar panels in conjunction with another method of heating the pool water for optimal performance.

Frequently Asked Questions (FAQ)

Q: Which heating option is best for my pool?
A: The right heating solution depends on your pool size, budget, insulation, and usage pattern. Heat pumps offer efficient, low running costs for many pools. Gas or oil boilers provide rapid heat but at higher fuel cost. Solar heating works well as supplementary heat, especially in summer. We can guide you on what suits your specific circumstances.

Q: Do I need ventilation or dehumidification for an indoor pool?
A: Yes. Without proper ventilation systems or dehumidifiers, indoor pools suffer from high humidity, condensation, structural damage and musty air. A well-designed ventilation or heat recovery system controls moisture, improves air quality, and protects the building.

Q: Can I use my domestic boiler to heat my pool?
A: Yes, through a heat exchanger - as long as your boiler is large enough to match the heating demand of your pool (and there is spare capacity from heating the house!) and is ideally located within 6m of your pool. Your domestic boiler can feed a pool heat exchanger so the pool water is heated without mixing with household plumbing. This can be an economical option if your boiler has spare capacity. If you are unsure if you are able to utilise your domestic heating boiler All Swim staff are on hand to advise.

Q: Are heat pumps cost‑effective?
A: For many installations, yes. A pool heat pump can deliver several units of heat energy for each unit of electricity input (often COP of 4- 6). While capital cost is higher, operational savings over time make them a popular choice.

Q: What about solar heating for pools?
A: Solar heating captures free energy from the sun to pre-heat water, reducing energy costs. However, due to seasonal and weather variability in the UK, solar should be paired with another heating method to ensure consistent performance.

Q: Can the same system heat the pool and ventilate the room?
A: Some advanced systems combine both functions, recovering heat from indoor air and using it to help warm the pool or fresh incoming air. These hybrid systems can improve energy efficiency and reduce running costs.

Q: Do you supply for pools all over the UK?
A: Yes - All Swim supplies heating and ventilation systems nationwide (UK mainland). We’ll assist with logistics, sizing, and guidance suitable for your location.